diff --git a/assets/css/main.css b/assets/css/main.css
index 142449d..e3a5717 100644
--- a/assets/css/main.css
+++ b/assets/css/main.css
@@ -209,11 +209,12 @@ header.site-header {
   padding: .4rem 1rem .4rem .55rem;
   border-radius: 999px;
   border: 1px solid color-mix(in srgb, var(--sprach-glut) 55%, rgba(255, 255, 255, .18));
-  background: rgba(10, 11, 15, .55);
+  background: rgba(4, 5, 8, .94);
   box-shadow:
     inset 0 0 0 1px rgba(255, 255, 255, .05),
-    0 3px 10px rgba(0, 0, 0, .35),
-    0 0 16px color-mix(in srgb, var(--sprach-glut) 40%, transparent);
+    0 3px 10px rgba(0, 0, 0, .5),
+    0 0 10px color-mix(in srgb, var(--sprach-glut) 55%, transparent),
+    0 0 22px color-mix(in srgb, var(--sprach-glut) 35%, transparent);
   transition: transform .2s ease, box-shadow .3s ease, border-color .3s ease;
 }
 .sprach-schalter > button:hover,
@@ -236,10 +237,17 @@ header.site-header {
   z-index: -2;
   background: var(--sprach-aurora);
   filter: blur(8px) saturate(1.3);
-  opacity: .85;
+  /* Bewusst nur ein dezenter Farbschein statt einer vollflächig bunten
+     Fläche — der Knopf selbst soll "leuchtend schwarz" wirken (Glow am
+     Rand + hinter der Kugel), nicht komplett eingefärbt. */
+  opacity: .32;
   animation: sprach-aurora-drift 7s ease-in-out infinite alternate;
   pointer-events: none;
 }
+.sprach-schalter > button:hover::before,
+.sprach-schalter.open > button::before {
+  opacity: .48;
+}
 @keyframes sprach-aurora-drift {
   from { transform: translate(-3%, -2%) rotate(0deg) scale(1); }
   to   { transform: translate(3%, 3%) rotate(8deg) scale(1.12); }